feat(rag): close eval pipeline with live snapshots

src/test/java/com/superbiz/agent/service/FrontmatterParserTest.java

@@ -146,4 +146,48 @@ class FrontmatterParserTest {
         assertEquals("1.0.0", result.getVersion());
         assertEquals("Test Author", result.getAuthor());
     }
+
+    @Test
+    void testParse_withRetrievalMetadata() {
+        String content = """
+            ---
+            title: MySQL Connection Pool
+            keywords: [connection pool, HikariCP]
+            summary: Diagnose exhausted MySQL connection pools
+            category: database
+            source: mysql-connection-pool
+            breadcrumb: Database > MySQL > Connection Pool
+            kb_scope: rag-eval
+            ---
+            Content
+            """;
+
+        Frontmatter result = parser.parse(content);
+
+        assertNotNull(result);
+        assertEquals("mysql-connection-pool", result.getSource());
+        assertEquals("Database > MySQL > Connection Pool", result.getBreadcrumb());
+        assertEquals("rag-eval", result.getKbScope());
+    }
+
+    @Test
+    void testStripFrontmatter_returnsMarkdownBodyOnly() {
+        String content = """
+            ---
+            title: Test
+            keywords: [frontmatter-only]
+            summary: Summary
+            ---
+
+            # Body
+
+            Body content
+            """;
+
+        String body = parser.stripFrontmatter(content);
+
+        assertFalse(body.contains("frontmatter-only"));
+        assertTrue(body.startsWith("# Body"));
+        assertTrue(body.contains("Body content"));
+    }
 }